/* Wilson Consulting - Styles */

/* ===========================
   CSS Custom Properties
   =========================== */
:root {
  /* Color Palette - Professional blues and dark grays for IT consulting
     All text/background combinations meet WCAG 2.1 AA contrast requirements:
     - Normal text (< 18pt): minimum 4.5:1 ratio
     - Large text (>= 18pt or >= 14pt bold): minimum 3:1 ratio */

  /* Primary colors */
  --color-primary: #1a5276;        /* Dark blue - primary brand color */
  --color-primary-dark: #0e3a55;   /* Darker blue - hover states */
  --color-primary-light: #2980b9;  /* Medium blue - accents */

  /* Neutral colors */
  --color-text: #1a1a2e;           /* Near-black - body text (contrast 15.5:1 on white) */
  --color-text-light: #4a4a5a;     /* Dark gray - secondary text (contrast 7.2:1 on white) */
  --color-heading: #0f1b2d;        /* Very dark blue-black - headings (contrast 17.4:1 on white) */
  --color-white: #ffffff;
  --color-background: #ffffff;
  --color-background-alt: #f4f7fa; /* Light blue-gray - alternate sections */
  --color-surface: #ffffff;        /* Card/surface backgrounds */

  /* Accent and feedback colors */
  --color-accent: #1a5276;         /* Same as primary for consistency */
  --color-error: #c0392b;          /* Red - error messages (contrast 5.6:1 on white) */
  --color-success: #1e7e34;        /* Green - success messages (contrast 5.1:1 on white) */

  /* Focus indicator */
  --color-focus: #2980b9;          /* Visible blue focus ring */
  --focus-outline-width: 3px;
  --focus-outline-offset: 2px;

  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-heading: var(--font-family-base);
  --font-size-base: 1rem;         /* 16px minimum */
  --font-size-sm: 0.875rem;       /* 14px */
  --font-size-lg: 1.125rem;       /* 18px */
  --font-size-xl: 1.5rem;         /* 24px */
  --font-size-2xl: 2rem;          /* 32px */
  --font-size-3xl: 2.5rem;        /* 40px */
  --line-height-base: 1.6;
  --line-height-heading: 1.2;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;

  /* Spacing scale */
  --space-xs: 0.25rem;   /* 4px */
  --space-sm: 0.5rem;    /* 8px */
  --space-md: 1rem;      /* 16px */
  --space-lg: 1.5rem;    /* 24px */
  --space-xl: 2rem;      /* 32px */
  --space-2xl: 3rem;     /* 48px */
  --space-3xl: 4rem;     /* 64px */
  --space-4xl: 6rem;     /* 96px */

  /* Layout */
  --max-width: 1200px;
  --border-radius: 4px;
  --border-radius-lg: 8px;
  --transition-speed: 0.2s;
}

/* ===========================
   CSS Reset / Box Sizing
   =========================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* Remove default margins and padding */
body,
h1, h2, h3, h4, h5, h6,
p,
ul, ol,
figure,
blockquote {
  margin: 0;
  padding: 0;
}

/* ===========================
   Base Body Styles
   =========================== */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);  /* 16px minimum */
  font-size: clamp(1rem, 1rem + 0vw, 1.125rem); /* Ensures minimum 16px at all viewports */
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

/* ===========================
   Typography Base
   =========================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  color: var(--color-heading);
  line-height: var(--line-height-heading);
  font-weight: var(--font-weight-bold);
}

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

p {
  margin-bottom: var(--space-md);
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  transition: color var(--transition-speed) ease;
}

a:hover {
  color: var(--color-primary-dark);
}

/* Remove list styles for navigation */
ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ===========================
   Skip Navigation Link
   Visually hidden until focused, then appears at top of viewport
   =========================== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 1000;
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-primary);
  color: var(--color-white);
  font-weight: var(--font-weight-bold);
  text-decoration: none;
  border-radius: 0 0 var(--border-radius) 0;
  transition: top var(--transition-speed) ease;
}

.skip-link:focus {
  top: 0;
  outline: var(--focus-outline-width) solid var(--color-focus);
  outline-offset: var(--focus-outline-offset);
}

/* ===========================
   Focus Indicators
   Visible focus styles on all interactive elements
   =========================== */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: var(--focus-outline-width) solid var(--color-focus);
  outline-offset: var(--focus-outline-offset);
}

/* Fallback for browsers that don't support :focus-visible */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus,
[tabindex]:focus {
  outline: var(--focus-outline-width) solid var(--color-focus);
  outline-offset: var(--focus-outline-offset);
}

/* Remove outline for mouse users in supporting browsers */
a:focus:not(:focus-visible),
button:focus:not(:focus-visible),
select:focus:not(:focus-visible),
[tabindex]:focus:not(:focus-visible) {
  outline: none;
}

/* Keep outline for inputs/textareas even on mouse focus for usability */
input:focus:not(:focus-visible),
textarea:focus:not(:focus-visible) {
  outline: var(--focus-outline-width) solid var(--color-focus);
  outline-offset: var(--focus-outline-offset);
}


/* ===========================
   Navigation / Header Styles
   =========================== */

/* Site Header - Desktop Layout */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-background-alt);
  position: sticky;
  top: 0;
  z-index: 100;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

/* Logo Styling */
.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo {
  min-width: 32px;
  min-height: 32px;
  max-height: 60px;
  width: auto;
  height: auto;
}

/* Hide checkbox toggle - CSS checkbox hack */
.nav-toggle {
  position: absolute;
  top: -9999px;
  left: -9999px;
  opacity: 0;
  width: 0;
  height: 0;
}

/* Hamburger label - hidden on desktop */
.nav-toggle-label {
  display: none;
  cursor: pointer;
  padding: var(--space-sm);
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

/* Hamburger icon (three lines) */
.nav-toggle-label .hamburger,
.nav-toggle-label .hamburger::before,
.nav-toggle-label .hamburger::after {
  display: block;
  background-color: var(--color-text);
  width: 24px;
  height: 3px;
  border-radius: 2px;
  transition: transform var(--transition-speed) ease, opacity var(--transition-speed) ease;
}

.nav-toggle-label .hamburger {
  position: relative;
}

.nav-toggle-label .hamburger::before,
.nav-toggle-label .hamburger::after {
  content: '';
  position: absolute;
  left: 0;
}

.nav-toggle-label .hamburger::before {
  top: -7px;
}

.nav-toggle-label .hamburger::after {
  top: 7px;
}

/* Desktop Navigation */
.site-header nav ul {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.site-header nav ul li a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius);
  transition: color var(--transition-speed) ease, background-color var(--transition-speed) ease;
}

.site-header nav ul li a:hover {
  color: var(--color-primary);
  background-color: var(--color-background-alt);
}

/* ===========================
   Mobile Navigation (below 768px)
   =========================== */
@media (max-width: 767px) {
  .site-header {
    flex-wrap: wrap;
    padding: var(--space-sm) var(--space-md);
  }

  /* Show hamburger icon on mobile */
  .nav-toggle-label {
    display: flex;
    order: 2;
  }

  .logo-link {
    order: 1;
  }

  /* Hide nav by default on mobile */
  .site-header nav {
    order: 3;
    width: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  /* Show nav when checkbox is checked */
  .nav-toggle:checked ~ nav {
    max-height: 300px;
  }

  /* Animate hamburger to X when open */
  .nav-toggle:checked ~ .nav-toggle-label .hamburger {
    background-color: transparent;
  }

  .nav-toggle:checked ~ .nav-toggle-label .hamburger::before {
    top: 0;
    transform: rotate(45deg);
  }

  .nav-toggle:checked ~ .nav-toggle-label .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
  }

  /* Stack nav links vertically on mobile */
  .site-header nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-sm) 0;
  }

  /* Touch targets: minimum 44x44px for nav links on mobile */
  .site-header nav ul li a {
    display: flex;
    align-items: center;
    min-height: 44px;
    min-width: 44px;
    padding: var(--space-sm) var(--space-md);
  }
}

/* ===========================
   Hero Section
   =========================== */
.hero {
  padding: var(--space-3xl) var(--space-lg);
  background-color: var(--color-background-alt);
}

.hero-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  gap: var(--space-xl);
}

.hero-content {
  flex: 1;
  max-width: 500px;
}

.hero h1 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-md);
}

.hero .tagline {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  margin-bottom: var(--space-xl);
}

.hero-image {
  flex: 1;
  max-width: 500px;
}

.hero-image svg {
  width: 100%;
  height: auto;
  display: block;
}

@media (max-width: 767px) {
  .hero-inner {
    flex-direction: column;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero .tagline {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-image {
    max-width: 100%;
  }
}

/* ===========================
   CTA Button
   =========================== */
.cta-button {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  min-width: 44px;
  min-height: 44px;
  background-color: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  border-radius: var(--border-radius);
  transition: background-color var(--transition-speed) ease, transform var(--transition-speed) ease;
  line-height: 1;
}

.cta-button:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-1px);
}

.cta-button:focus-visible {
  outline: var(--focus-outline-width) solid var(--color-focus);
  outline-offset: var(--focus-outline-offset);
}

/* ===========================
   Services Section
   =========================== */
.services {
  padding: var(--space-3xl) var(--space-lg);
  max-width: var(--max-width);
  margin: 0 auto;
}

.services h2 {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

@media (min-width: 768px) {
  .services-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* ===========================
   Service Cards
   =========================== */
.service-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-background-alt);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  text-align: center;
}

.service-icon {
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

.service-icon svg {
  width: 48px;
  height: 48px;
}

.service-card h3 {
  margin-bottom: var(--space-sm);
}

.service-card p {
  color: var(--color-text-light);
  font-size: var(--font-size-base);
}

/* ===========================
   About Section
   =========================== */
.about {
  padding: var(--space-3xl) var(--space-lg);
  max-width: 800px;
  margin: 0 auto;
}

.about h2 {
  margin-bottom: var(--space-xl);
}

.about p {
  color: var(--color-text);
  line-height: var(--line-height-base);
}

/* ===========================
   Footer
   =========================== */
.site-footer {
  background-color: var(--color-heading);
  color: var(--color-white);
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
}

.site-footer p {
  color: var(--color-white);
}

.site-footer a {
  color: var(--color-white);
  text-decoration: underline;
}

.site-footer a:hover {
  color: var(--color-background-alt);
}


/* ===========================
   Contact Section & Form
   =========================== */
.contact {
  padding: var(--space-3xl) var(--space-md);
  background-color: var(--color-background-alt);
}

.contact h2 {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.contact form {
  max-width: 600px;
  margin: 0 auto;
}

/* Form group: labels above inputs with consistent spacing */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

/* Input and textarea styling */
.form-group input,
.form-group textarea {
  width: 100%;
  min-height: 44px;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-text-light);
  border-radius: var(--border-radius);
  transition: border-color var(--transition-speed) ease;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-focus);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

/* Submit button: prominent, min 44px height */
.contact form button[type="submit"] {
  display: block;
  width: 100%;
  min-height: 44px;
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-family-base);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  background-color: var(--color-primary);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background-color var(--transition-speed) ease;
}

.contact form button[type="submit"]:hover {
  background-color: var(--color-primary-dark);
}

/* On larger screens, button doesn't need to be full width */
@media (min-width: 768px) {
  .contact form button[type="submit"] {
    width: auto;
    padding: var(--space-sm) var(--space-2xl);
  }
}

/* Error messages: red, small font, only visible when content is present */
.error-message {
  display: block;
  min-height: 0;
  margin-top: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-error);
  line-height: var(--line-height-base);
}

.error-message:empty {
  display: none;
}

/* General error message (e.g., mail send failure) */
.general-error-message {
  max-width: 600px;
  margin: 0 auto var(--space-lg);
  padding: var(--space-md);
  background-color: #fdf0ef;
  border: 1px solid var(--color-error);
  border-radius: var(--border-radius);
  color: var(--color-error);
  font-size: var(--font-size-base);
}

.general-error-message p {
  margin: 0;
}

/* Success message: green background/border, padding */
.success-message {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--space-lg);
  background-color: #e8f5e9;
  border: 1px solid var(--color-success);
  border-radius: var(--border-radius);
  color: var(--color-success);
  font-size: var(--font-size-lg);
  text-align: center;
}

.success-message p {
  margin: 0;
}

/* Honeypot field: hidden from humans */
.hp-field {
  position: absolute;
  left: -9999px;
  opacity: 0;
}

/* Ensure touch targets on mobile (44x44px minimum) */
@media (max-width: 767px) {
  .form-group input,
  .form-group textarea {
    min-height: 44px;
    padding: var(--space-md);
  }

  .contact form button[type="submit"] {
    min-height: 44px;
  }
}